package com.bit.demo1;

public class hkjh {
}


/*public class date{
        public int yearl;
        public int month;
        public int day;
        public date(){

        }
}

    public static void main22(String[] args) {
         class pedog{
            public String name;
            public String color;
            public void bark(){
                System.out.println(name+"旺旺叫");
            }
            public void wag(){
                System.out.println(name+"摇尾巴");
            }
        }
        int a=10;
        System.out.println(a);
        pedog dog=new pedog();
        dog.name="小黄";
        dog.color="白色";
        dog.wag();
        dog.bark();
        pedog dog2=new pedog();
        dog2.name="小黑";
        dog2.color="白";
        dog2.wag();
        dog2.bark();

	// write your code here
    }*//*

*/
/*public static int num(int[]num,int nums){
        int ret=0;
        for(int i=0;i<nums;i++){
            ret=num[i]^ret;

        }
        return ret;
}

    public static void main33(String[] args) {

        int[] arr={1,1,2,2,3,4,4};
        int nums=arr.length;
        int singlenum=num(arr,nums);
        System.out.println(singlenum);

    }
public static int panu(int n){
    if (n==1||n==2){
        return 1;
    }
    int f1=1;
    int f2=1;
    int f3=1;
    for (int i=3;i<n;i++){
        f3=f1+f2;
        f1=f2;
        f2=f3;
    }
    return f3;
}
public static int ref(int n){
    int sum=0;
    int ret=1;

    for (int i=1;i<=n;i++){
        ret*=i;
        sum+=ret;
    }
    return sum;
}
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int n= scanner.nextInt();
        int num=ref(n);
        System.out.println(ref(n));

    }
}
*/
